HACKTHEBOX — CRYPTO : BANK-HEIST | Done by VENOME1995

Ishara Abeythissa
2 min readNov 12, 2019

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Problem

Hey guys today I’m did write up about bank-heist on HacktheBox. So as you can see under the description it is definitely related to cryptography and as well as kind of forensics scenario either. So I downloaded secret massage and read it.

444333 99966688 277733 7773323444664 84433 22244474433777, 99966688 277733 666552999. 99966688777 777744277733 666333 84433 443344477778 4447777 44466 99966688777 4466688777733. 84433 5533999 8666 84433 55566622255 4447777 22335556669. 4666 8666 727774447777.

47777888 995559888 4555 47777888 44999988 666555997 : 8555444888477744488866888648833369!!

A large set of numbers included this secret massage. What the hell? :(

And again I looked at the problem and I saw this massage generated using mobile phone. So this exactly should based on mobile keypad. By the way referring some tools in internet I found phone keypad cipher decoder.

Link : — https://www.dcode.fr/multitap-abc-cipher

IF YOU ARE READING THE CIPHER YOU ARE OKAY YOUR SHARE OF THE HEIST GHS/HGS/IRP/IS IN/IMM YOUR HOUSE THE KEY TO THE LOCK GHS/HGS/IRP/IS BELOW GO TO PARIS (GSV XLWV GL GSV HZU OLXP TLIVGRIVNVMGUFMW)

And the flag exactly this letters which I bold above text. And referring furthermore I figure out pattern of this similar to Atbash encryption. Atbash encryption is, uses a substitution alphabet and its reciprocal, a combination of the normal alphabet and its reverse alphabet (mirrored).

Normal A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Reverse Z Y X W V U T S R Q P O N M L K J I H G F E D C B A

Link : — https://www.dcode.fr/atbash-mirror-cipher

FLAG : — Not here dude…. Try it and take it.

I’ve been given complete instructor for this. and flag is up to you guys.

Hope you enjoy and took some knowledge from my post.

Meet me in hackthebox arena and I’m venome1995 and Respect appreciated.

Subscribe me for more posts. Keep in touch !!!!!

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